Based on Article 230.40 Ex. 1, each occupant of a multi occupancy building is permitted to have a set of Service Conductors run for his/her occupancy. The Code goes on further to say that this set of Service Conductors is limited to six Service Disconnects located in one location 230.71(A) and 230.72(A). Now the question: If I have this situation and we have a central location for the utility supply, can each of these occupants have their Service Disconnects (up to six) located near the Service Point and exceed the magic number of six? In other words, occupant #1 has four Service Disconnects on his Service Conductors and occupant #2 has four Service Disconnects on his Service Conductors. Both of these occupant's Service Disconnects are properly identified as to load served etc.and are located in the same general area. Is this a problem from a Code stand point or a safety hazard?
230.40 Ex1 deals with services of differnt voltages or phases.
I have no idea what pages 129, 130, or 131 have to do with this. Is that from the 2002 NEC?
Service entrance conductors are the conductors that are fed from the POCO overhead or underground feed. (See the definition in article 100) There are only Six disconnects maximum (six hand movements) allowed to turn off the power.
Re: Grouping of Service Disconnects#87735 04/10/0409:02 PM04/10/0409:02 PM
In other words, occupant #1 has four Service Disconnects on his Service Conductors ...
Service Disconnect isn't defined in Art. 100 by that title, but as I understand it, it is AKA a "main"... the "numero uno" breaker (residential min 100A), that, by being turned off, kills power to all of the branch circuits contained in the same panel (main breaker style), or any panels "downstream" from it's location if remote...say at the meter.
Four Service Disconnects for one residence? Am I missing something?
Re: Grouping of Service Disconnects#87736 04/12/0407:58 AM04/12/0407:58 AM
Russ M Code are pages from the N.F.P.A. Electrical Code HANDBOOK Not Code book 2002. The pages deal with service entrance conductors underground and overhead in Pictures!!!!It Does apply and deals with the six disconnect rules. Maybe you should expand your Libary a bit. The book is put out by the NFPA same ones who do the code.
Re: Grouping of Service Disconnects#87737 04/12/0410:23 AM04/12/0410:23 AM
I understand the "rule of six" per structure (230 (F) in the 96 NEC). It just seemed like the question had multiple service disconnects for one residence in a multi-occupancy structure.
The question seemed to be awkwardly worded - Even though term service disconnect was being used, it seemed to me that George could be inadvertantly referring to branch circuits for each occupancy within a multi occupancy structure, rather than "main d/c's" that would control power to a sub-panel located inside each occupancy.
That's why I was surprised/confused.
BTW - I second the recommendation for the NFPA Code Handbook. EXCELLENT reference / explanatory material.